Question

A pure semiconductor behaves like an insulator at -

• A. $273\text{K}$
• B. $0\text{K}$
• C. $293\text{K}$
• D. $300\text{K}$

Answer 1

The correct option is B $0\text{K}$

At absolute zero, all the valence electrons are tightly bound, and no free electron is available for electrical condition in a pure semiconductor.

So, it is a perfect insulator at absolute zero.

Hence, option $\left(B\right)$ is the correct answer.